Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4940a3b30703cde2f2e109e0e046be2c0078fa43eb5e8fa256f9a1f8bde816a' 
  AND token = 'FopfUZe3wWUqYsJKA2vS72RL4Uj0MkTVE3CBfFPl95k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}